Internet Engineering Task Force (IETF) D. Papadimitriou
Request for Comments: 6001 M. Vigoureux
Updates: 4202, 4203, 4206, 4874, 4974, 5307 Alcatel-Lucent
Category: Standards Track K. Shiomoto
ISSN: 2070-1721 NTT
D. Brungard
ATT
JL. Le Roux
France Telecom
October 2010
Generalized MPLS (GMPLS) Protocol Extensions
for Multi-Layer and Multi-Region Networks (MLN/MRN)
Abstract
There are specific requirements for the support of networks
comprising Label Switching Routers (LSRs) participating in different
data plane switching layers controlled by a single Generalized Multi-
Protocol Label Switching (GMPLS) control plane instance, referred to
as GMPLS Multi-Layer Networks / Multi-Region Networks (MLN/MRN).
This document defines extensions to GMPLS routing and signaling
protocols so as to support the operation of GMPLS Multi-Layer /
Multi-Region Networks. It covers the elements of a single GMPLS
control plane instance controlling multiple Label Switched Path (LSP)
regions or layers within a single Traffic Engineering (TE) domain.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6001.
Papadimitriou, et al. Standards Track [Page 1]RFC 6001 GMPLS Protocol Extensions for MLN/MRN October 2010Copyright Notice
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Papadimitriou, et al. Standards Track [Page 2]RFC 6001 GMPLS Protocol Extensions for MLN/MRN October 2010Table of Contents
1. Introduction ....................................................3
1.1. Conventions Used in This Document ..........................4
2. Summary of the Requirements and Evaluation ......................4
3. Interface Adjustment Capability Descriptor (IACD) ...............5
3.1. Overview ...................................................5
3.2. Interface Adjustment Capability Descriptor (IACD) ..........6
4. Multi-Region Signaling ..........................................9
4.1. XRO Subobjects ............................................10
5. Virtual TE Link ................................................12
5.1. Edge-to-Edge Association ..................................13
5.2. Soft Forwarding Adjacency (Soft FA) .......................16
6. Backward Compatibility .........................................18
7. Security Considerations ........................................18